Vulnerability-Lookup

CVE-2026-55884 (GCVE-0-2026-55884)

Vulnerability from cvelistv5 – Published: 2026-07-10 21:36 – Updated: 2026-07-29 19:26

Title

Tilt: Missing authentication on the network-exposed Tilt HUD server

Summary

Tilt defines dev environments as code for microservice apps on Kubernetes. From 0.20.8 through 0.37.3, the Tilt HUD HTTP server registers handlers on a gorilla/mux router with no authenticating middleware. When the HUD is bound to a non-loopback address, an unauthenticated network caller can trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state including the session token, and invoke apiserver resources through the token-attaching /proxy handler. This issue is fixed in version 0.37.4.

Severity

9.2 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 04:01 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/tilt-dev/tilt/security/advisor…	x_refsource_CONFIRM
https://github.com/tilt-dev/tilt/pull/6776	x_refsource_MISC
https://github.com/tilt-dev/tilt/commit/47393fba7…	x_refsource_MISC
https://github.com/tilt-dev/tilt/releases/tag/v0.37.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
tilt-dev	tilt	Affected: >= 0.20.8, < 0.37.4	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-55884",
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FKIE_CVE-2026-55884

Vulnerability from fkie_nvd - Published: 2026-07-10 22:16 - Updated: 2026-07-29 20:17

Severity

9.2 (Critical) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a
	security-advisories@github.com	https://github.com/tilt-dev/tilt/pull/6776
	security-advisories@github.com	https://github.com/tilt-dev/tilt/releases/tag/v0.37.4
	security-advisories@github.com	https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "tilt",
          "vendor": "tilt-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.20.8, \u003c 0.37.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tilt defines dev environments as code for microservice apps on Kubernetes. From 0.20.8 through 0.37.3, the Tilt HUD HTTP server registers handlers on a gorilla/mux router with no authenticating middleware. When the HUD is bound to a non-loopback address, an unauthenticated network caller can trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state including the session token, and invoke apiserver resources through the token-attaching /proxy handler. This issue is fixed in version 0.37.4."
    }
  ],
  "id": "CVE-2026-55884",
  "lastModified": "2026-07-29T20:17:04.337",
  "metrics": {
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          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.2,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
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          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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}

GHSA-C73Q-8XXR-RGQM

Vulnerability from github – Published: 2026-06-19 13:58 – Updated: 2026-06-19 13:58

Summary

Tilt: Missing authentication on the network-exposed Tilt HUD server

Details

Summary

The Tilt HUD HTTP server exposes state-changing and sensitive-read endpoints with no authentication. When the HUD is bound to a non-loopback address, a network attacker can trigger the developer's pre-defined Tiltfile resources, tamper with Tiltfile arguments, read full engine state including the session token, and reach the Tilt apiserver through a token-attaching proxy.

Details

The HUD server registers its handlers on a gorilla/mux router with no authenticating middleware. The cookieWrapper helper emits the Tilt-Token cookie but never validates it, and is attached only to the static-asset prefix.

Impact

An unauthenticated network caller can force any developer-defined resource to run on the host as the tilt user (choosing which and when, not the command text), set arbitrary Tiltfile arguments, disclose the session token and full engine state, and invoke apiserver resources via the loopback-token proxy. Because tilt up runs with the developer's privileges and credentials, the impact reaches the developer's environment and cluster.

Conditions for exploitation

Affected version in >= 0.20.8, <= 0.37.3.
HUD bound to a non-loopback address (tilt up --host 0.0.0.0, or TILT_HOST set).
Network reachability to the listener (default port 10350).

Not affected

The default loopback-only bind is not reachable from the network.

Workarounds

Use the default loopback bind (omit --host, unset TILT_HOST) and ensure nothing else proxies to localhost:10350. No complete workaround short of upgrading for non-loopback deployments.

Severity

9.2 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.37.3"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tilt-dev/tilt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.20.8"
            },
            {
              "fixed": "0.37.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55884"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T13:58:13Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "## Summary\nThe Tilt HUD HTTP server exposes state-changing and sensitive-read endpoints with no authentication. When the HUD is bound to a non-loopback address, a network attacker can trigger the developer\u0027s pre-defined Tiltfile resources, tamper with Tiltfile arguments, read full engine state including the session token, and reach the Tilt apiserver through a token-attaching proxy.\n\n## Details\nThe HUD server registers its handlers on a `gorilla/mux` router with no authenticating middleware. The `cookieWrapper` helper emits the `Tilt-Token` cookie but never validates it, and is attached only to the static-asset prefix.\n\n## Impact\nAn unauthenticated network caller can force any developer-defined resource to run on the host as the `tilt` user (choosing which and when, not the command text), set arbitrary Tiltfile arguments, disclose the session token and full engine state, and invoke apiserver resources via the loopback-token proxy. Because `tilt up` runs with the developer\u0027s privileges and credentials, the impact reaches the developer\u0027s environment and cluster.\n\n### Conditions for exploitation\n- Affected version in `\u003e= 0.20.8, \u003c= 0.37.3`.\n- HUD bound to a non-loopback address (`tilt up --host 0.0.0.0`, or `TILT_HOST` set).\n- Network reachability to the listener (default port `10350`).\n\n### Not affected\n- The default loopback-only bind is not reachable from the network.\n\n## Workarounds\nUse the default loopback bind (omit `--host`, unset `TILT_HOST`) and ensure nothing else proxies to `localhost:10350`. No complete workaround short of upgrading for non-loopback deployments.",
  "id": "GHSA-c73q-8xxr-rgqm",
  "modified": "2026-06-19T13:58:13Z",
  "published": "2026-06-19T13:58:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tilt-dev/tilt/pull/6776"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tilt-dev/tilt"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tilt-dev/tilt/releases/tag/v0.37.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Tilt: Missing authentication on the network-exposed Tilt HUD server"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-55884 (GCVE-0-2026-55884)

FKIE_CVE-2026-55884

GHSA-C73Q-8XXR-RGQM

Summary

Details

Impact

Conditions for exploitation

Not affected

Workarounds

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